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No. 2'70-,927. Patented JamZS,1883.

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G. B. BRAYTON. REGULATING THE SUPPLY OF OIL T0 VAPOR ENGINES. No. 270,927. Patented Jan.23,1883.

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UNITE STATES PATE T OFFICE.

' GEORGE B. B'RAYTON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE BRAYTON PETROLEUM ENGIN E COMPANY, OF SAME PLACE.

REGULATING THE SUPPLY OF OIL TO VAPOR-ENGINES.

SPECIFICATION forming part of Letters Patent No. 270,927, dated January 23, 1883. Application filed April 10, 1882. (No model) being bad to the accompanying drawings, and

to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to means for governing the supply of oil fed to air-carburetors by a pump,whereby thesupplyofoil thusfurnished is automatically adapted to the amount re- .quired, my invention being especially in tended for use in vapor-engines employing a gas made from the vapors of petroleum or other oil rich in hydrocarbons, used with atmospheric air.

7 My invention consists in certain mechanical details of construction by which the length of stroke of the pump-piston is automatically changed (increased or diminished) in accordance with the amount of gas requisite to perform a given labor.

The drawings accompanying this specification represent in Figure 1 a sectional elevation, and in Fig. 2 a cross-section, of a device embodying my improvements. Fig. 3 shows the connection of the oil-pumps and the air-tank with the carburetor, and also the means whereby the air is supplied to the tank.

Reference being bad to the above-named drawings, it will be seen that A represents a liquid-injecting pump of anysuitable construc tion, while (t represents the piston-rod of such pump, the outer end of this rod terminating in a tubular head, I).

B represents a second rod arranged in axial alignment with the first, and at one end enterin g loosely the socket or bore in the outer end of the rod a, this rod B, atiits opposite end, being connected with the eccentric by which the piston is operated. The rod B plays within the rod a so loosely as of itself to effect no movements of the pump-piston; and to compel the two to move together, andthereby put the pump in operation, I employ a tapering vertical or wedge-shaped key, 0, which is contained in vertical coinciding slots 61 6, created longitudinally in the said rods to and B. The two slots d e constitute a common passage, which is filled to a greater or less extent by the key 0, accordingasthealtitudeofthelattermayvary. When it is in its lowest position the key is supposed to fill both slots, and no slip movement can take place between the two'rods aB; hence the full impulse is given to the pump-plunger. As the key is raised from this position a slip movement is permitted between the two rods and the stroke of the pump-plunger is shortened to an extent corresponding to the degree of altitude of the key, and the supply of oil delivered by the pump is lessened to a corresponding extent.

Q To automatically change the altitude of the key 0 in accordance with any increase or diminution in the amount of oil consumed or required for consumption, I secure the lower end of the stem f of the key 0 adjustably to the tail g of a horizontal weighted lever, h, the base of which is pivoted to the dome or cap '5 of a diaphragm-case, j, the interior of such case being connected with the air-tank of the carburetor,with which the pump is connected by a pipe, n.

Within the casej, I securea horizontal elastic diaphragn1,.7c, and I erect upon and secure in a proper manner to this diaphragm a stem, l,

which extends upward through the dome of the casej and supports the weight of the lever h, the weight m of the lever serving to equipoise the diaphragm to the pressure of the airtank of the carburetor O to insure the drop of the key 0.

If the pressure of air in the tank increases or diminishes in correspondence with the amount of gas consumed, whether driving an engine or otherwise, the diaphragm is distended, the lever and key raised, and the stroke of the pump-plunger shortened,and vice versa.

This invention is an improvement on that set forth in Patent No. 151,468, granted to me June 2, 1874, to which reference is hereby made for a fuller explanation and illustration of the air-tank, the means for supplying the same, the cause of the varying pressure, and other features which need not be here repeated.

In Fig. 3 it will be seen that the air-tank a is supplied with air on the upward stroke of the piston. Consequentlythepressurewillvary somewhat with the speed of the engine. This varying pressure would correspond exactly with the varying pressure in a steam-boiler, all depending on the amount of work being done at any given moment or period. Said pressure is transmitted from a to thediaphragm and diaphragm-chamber through pipe a, and thence to the pump.

The operation of the carburetor is the same as that shown and described in the Letters Patent Nos. 125,116 and 151,468, granted to me April 2, 1872, and June 2, 1874, respectively. Reference to said patents (and particularly to the last named) is hereby made for a fuller and more explanatory description of this device.

I claim 1. In combination with the oil-supply pump and the air-tank of an air-carburetor,mechanism, substantially as described, interposed between the two, wherebythe changes impressure in such air-tank effect corresponding changes in the length of stroke of the pumpplunger to automatically accommodate the amount of oil fed by the pump to the requirements of the motor supplied with gas.

- 2. In combination with the oil-supply pump and the air-receiver of an air-carburetor, the two rods a and B, having axial play with respect to each, and slotted to receive the key 0, the diaphragm-case and its diaphragm, the lever l1, pivoted to the diaphragm-case and fulcrumed upon the diaphragm, and adjustably secured at its tail to the stem of the key a, and the key 0, playing with the slots of the rods a and B, all substantially as stated.

In testimony whereof I affix my signature in presence of two witnesses.

e GEORGE BAILEY BRAYTON. Witnesses:

H. E. LODGE, F. CURTIS. 

